The invention provides a multi ring drawing screw capable of bearing large longitudinal tensile force and transverse vibration clearance at the same time. The multi ring pull screw package includes a screw and an expansion sleeve arranged outside the screw. The expansion sleeve is arranged in an axial direction along the screw, and the openings at both ends of the expansion sleeve are outwardly enlarged, and the side wall of the expansion sleeve is provided with a number of incisions along the axial direction, and the incision from the opening of the expansion sleeve is directed. The middle extension of the expansion sleeve. In the expansion sleeve of the invention, when the expansion sleeve is expanded, the opening intersection of the adjacent expansion sleeve is expanded, and the expansive tongue pieces between the upper and the upper and lower counterposition are interlaced and swollen and swollen, and the multi-layer expansion tongue is formed in the longitudinal direction, providing a larger longitudinal tensile force and a plurality of swollen swollen through space intersecting. The expansion tongue can well withstand and reduce the vibration gap caused by the transverse vibration of the detonating screw, and improve the steadiness of the detonating screw.
【技术实现步骤摘要】
一种多环拉爆螺丝
本专利技术涉及拉爆螺丝
,具体涉及一种多环拉爆螺丝。
技术介绍
目前市售的拉爆螺丝均为单侧舌片的拉爆螺丝,由于圆筒形膨胀套的侧壁均为光滑表面,且提供纵向拉力的舌片受力单一,因此这种结构的拉爆螺丝只能承受较小的纵向拉力,面对需要承受较大纵向拉力和横向的震动间隙的使用场景则力有不逮。
技术实现思路
本专利技术的目的是提出一种可以很好的同时承受较大纵向拉力和横向震动间隙的多环拉爆螺丝。根据本专利技术提供的多环拉爆螺丝,包括螺钉和套在螺钉外部的膨胀套,关键在于所述膨胀套沿所述螺钉的轴向紧密排列设有多个,所述膨胀套的两端开口均呈向外扩大的喇叭状,所述膨胀套的侧壁沿轴向设有若干切口,所述切口从所述膨胀套的开口向膨胀套的中部延伸。本专利技术的多环拉爆螺丝,使用方法与现有的拉爆螺丝相同,通过旋紧螺钉的螺帽使膨胀套部分裂开膨胀,卡住墙壁完成固定,与现有的拉爆螺丝不同的是,本专利技术的膨胀套设有多个,膨胀套膨胀时,相邻的膨胀套喇叭状的开口交接处膨胀,可以使上下相互对位的膨胀舌片互相交错膨胀岔开,不仅在纵向形成多层膨胀舌片,提供更大的纵向承受拉力,还通过空间交错岔开的多个膨胀舌片,可以很好的承受并减少拉爆螺丝受到的横向震动产生的震动间隙,提高拉爆螺丝的稳固性。进一步的,所述切口以所述膨胀套的侧壁中点为对称中心成对设置,以使膨胀套的爆炸切口受力均匀。进一步的,所述切口与所述膨胀套的开口交接点均匀间隙设置,保证膨胀套的膨胀舌片与墙壁的接触位置均匀间隙,提升稳固性。进一步的,相邻两个膨胀套的切口沿所述螺钉的轴向相互错开位置设置。这样可以使上下相邻两个膨胀套的膨胀舌 ...
【技术保护点】
一种多环拉爆螺丝,包括螺钉和套在螺钉外部的膨胀套,其特征在于所述膨胀套沿所述螺钉的轴向紧密排列设有多个,所述膨胀套的两端开口均呈向外扩大的喇叭状,所述膨胀套的侧壁沿轴向设有若干切口,所述切口从所述膨胀套的开口向膨胀套的中部延伸。
【技术特征摘要】
1.一种多环拉爆螺丝,包括螺钉和套在螺钉外部的膨胀套,其特征在于所述膨胀套沿所述螺钉的轴向紧密排列设有多个,所述膨胀套的两端开口均呈向外扩大的喇叭状,所述膨胀套的侧壁沿轴向设有若干切口,所述切口从所述膨胀套的开口向膨胀套的中部延伸。2.根据权利要求1所述的多环拉爆...
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